Process of making flexible coupling members, &amp;c.



R. A. SMITH. PROCESS OF MAKING FLEXIBLE COUPLING MEMBERS APPLICATIONFILED MAY 3. 1920. I

Patented Feb. 15, 1921.

81200 14 fez UNlTED STATES PATENT orrice.

ROBERT A. SMITH, OF MAHVJAH, NEXRT JERSEY, ASSIGNQB T0 SMITH ANDSERRELL, OF IVIAHW'AH, NEW JERSEY, A GOBARTNERSHIP CONSISTING OF ROBERTA SMZTH ID JOHN J. SEE/BELL.

PROCESS OF MAKIIWG- FLEXIBLE COUPLING MEMBERS, &c.

Specification of Letters Patent.

Original application filed August 4, 1919, Serial No. 315,060. Dividedand this application filed May 3,

the following is a specification, taken in connection with theaccompanying drawing, which forms part of the same.

The intention in this case, which is a division of my copendingapplication, Serial No. 315,060, filed August l, i919, flexiblecouplings, that is, contains subject-matter.

taken therefrom, relates especially to proc esses of making flexiblecoupling members or the like in which the flanged or other couplingmembers adapted to be connected to the shafts and also in some cases anintermediate floating ring coupling member are cast or otherwise formedwith rough recesses which may be conveniently cored out in the case ofcast iron or steel coupling members. These coupling members may beexternally turned or otherwise shaped before or after the recesses arelined and are preferably all finished to substantially the same externaldiameter and axial thickness adjacent the edge portions. Then by diecasting or other special casting methods Babbitt or bearing metal castin linings may be formed in the rough or cored recesses previouslyformed in the coupling members and securely and permanently retained inposition therein, so that alined and sized bearing holes which may be ofrectangular section are conveniently and accu 'ately located in thecoupling members, interchangeable jigplates and cooperating mandrelsbeing preferably used in connection with the casting of these linings soas to accurately locate the same and insure exact correspondence of thebearing holes which are thus formed in different cooperating couplingmembers. While, of course, circular or other holes may be formed in thisway, the method is of special value and utility in forming andaccurately spacing and alining rectangular sectioned holes in thecoupling members which are especially desirable for use in connectionwith rectangular sectioned resilient coupling pins comprising laminatedspring elements antlcoiiperating rigid bearing plates.

Serial No. 378,610.

in the accompanying drawing showing in a somewhat diagrammatic wayillustrative couplings formed by this method together with illustrativeapparatus for producing the same,

Figure 1 is a longitudinal section through one form of shaft couplingshowing cooperating coupling members embodying this in- Yention.

Fig. 2 is a transverse section through one of these coupling memberstaken substantially along the line 22 of Fig. 1 and illustratin g theway in which the cast in linings may be formed. 7 V I Fig. 3 is apartial side View of one of the outer coupling members.

Fig. st is a View of one of the coupling pins, and

Fig. 5 is a side View showing a different forn'i of bearing hole whichmay be formed in these coupling members by this process.

An illustrative form of coupling which may be made by this process isshown in Fig. i as comprising flange coupling mem bers 2, 3, formed withkeyed or other holes so as to be connected to the shafts 1, a, and theseimiform diameter coupling members may by this process be formed withcoiiperating bearingholes of rectangular or other suitable cross-sectionto accommodate the resilient coupling pins employed. The Babbitt metalor other lining 7 preferably forming these bearing holes is cast intothe cored out or rough recesses 6 originally formed in the couplingmembers so as to accurately locate and finish the alined been ing holes.It is of course understood that the resilient coupling pins used. maybridge directly across the cooperating bearing holes in. these flangecoupling members, or if desired. an interposed floating ring couplingmember may be used between them formed with similarly spaced holes sothat the resilient coupling pins may yieldingly connect the adjacentcoupling members so as to give a still greater degree of yield betweenthe two shafts;

These coupling members may be formed of blanks of cast iron cast steel,etc, originally cast with enlarged cored out or roughly shaped recesses6 generally corresponding in number and location to the holes for thecoupling pins, and then by turning or otherthis way rectangularsectioned holes wise shaping these cast metal blanks at least theirlateral peripheral edge portions adjacent their fiat faces may beaccurately sized and preferably given the same diameter, and in manycases also it is advantageous to have the blanks or couplingmembersfinished to substantially the same axial width or thickness. Babbittmetal or other suitable relatively fusible bearing metal linings may becast, forced or otherwise located within these recesses so as toproperly position and shape the bearing holes for the coupling pins. Asindicated in Fig.2, one of these coupling members 5 may have a bottomcasting or plat 1'7 arranged in connection therewith and accuratelylocated with respect thereto as by a locating flange or member 18, whilea similar top plate 15 may'have a locating flange or series ofprojections 16 similarly engaging the periphery of this coupling member.Suitable mandrels may extend through the holesin these plates so as tothus be accurately positioned with respect to the cou pling member,andfor instance, rectangular sectioned expanding mandrels 20 preferablyformed with smooth or polished outer surfaces which may be lightly oiledor greased in some cases, may be simultaneously arranged and located inone or more of these recesses. A pouring or feeding opening 21 may ofcourse beleft in each case through which Babbitt or other bearing metalmay as indicated in Fig. 2 be cast or forced into the recesses aroundthese mandrels so as to form accurately positioned and sized andsurfaced linings 7' for the coupling pins. After such linings are castor formed the plates 15, 1'? may be-removed and then the mandrels may betaken out after in some cases first compressing the linings by slightlyexpanding the mandrels so as to form compressed hearing faces 19 againstwhich the coupling pins may engage and thus also further smooth thebearing faces and more securely unite the linings to the couplingmembers. In may be eiiectively, quickly and cheaply formed for theseresilient coupling pins and also a better and more eflicient operationof the couplings secured because of the reduction of friction betweenthese parts, especially under extreme conditions of lubrication.

Of course rectangular or square sectioned bearing holes are advantageousin coupling members of this type because as indicated in Fig. at thecooperating resilient coupling pins comprising laminated springs 13 maybe more readily and efiicientlygiven a rectangular cross-section inconnection with bearing plates 8, 23, which may be secured on eitherside of the springs as by rivets 11. One of these sets of bearing platesmay also be formed with integral securing flanges having bolt cats 22 toacommodate the securing bolts 10 which may thus readily secure the pinswithin these alined and sized bearing holes as shown in Figs. 1 and 3,it being understood, of course, that this invention is not limited toany particularcoin structional details of the coupling pins which mayhave a considerably greater length of exposed or free leaf springsespeciallyin single type couplings.

As illustrated in Fig. 5 this method may also be used for forming. andaccurately alining and positioning cylindrical bearing holes in suchcoupling members. The blanks for these coupling members 2 may be originaly cast or formed with enlarged cored recesses and then turned down orshaped so as to fit the casting jigs of the general type illus trated inconnection with Fig. 2 which may support the cylindrical or otherexpanding mandrcls' around which these bearing metal linings may be castinto the cored recesses to form and accurately position the bearingholes 26 therein. 0fv course the coupling pins for such round holes aresomewhat dif' ferently constructed and may have the leaf springs 25 heldtogether by the cylindrical rigid bearingplates 27 and rivets 11,although, of course, other types of coupling pins may be used for suchservice.

This invention has been described in con nection with a numberofillustrative materials, arrangements, number and order of steps, methodsof manufacture and use and illustrative shapes, forms, proportions andarticles which may be made by these'processes, to the details of whichdisclosure the invention is not of course to be limited, since what isclaimed as new and what is desired to be secured by Letters Patent isset forth in the appended claims:

1. The process of making flexible coupling members or the like whichcomprises casting blanks for said coupling memberswith enlarged roughcored recesses, turning up and shaping said blanks, to substantiallyuniform outside edge diameter and axial Width, gether with casting jigsfitting their peripheral edges and with rectangular sectioned expandingmandrels casting jigs and corresponding to the hearing holes to beformed in the coupling members, casting in Babbitt metal linings intosaid rough cored recesses and around said mandrels to accurately alineand locate said linings, removing said jig plates, expanding saidmandrels to compress and smooth the bearing faces of said linings andaccurately size the rectangular sectioned bearing holes thus formed insaid coupling members for cooperation with resilient laminated springcoupling pins. 7 r i 2. The process of makin flexible coupling membersor the like whi'cll, comprises castmg blanks forsaid couplingrmemberswith located in said assembling the shaped'blanks toenlarged rough coredrecesses, shaping said blanks to substantially uniform outside edgediameter, assembling the shaped blanks together with casting jigsfitting their peripheral edges and with rectangular sectioned expandingmandrels located in connection with sald casting jigs and correspondingto the bearing holes to be formed in the coupling members, casting inbearing metal linings into said rough cored recesses and around saidinandrels to accurately aline and locate said linings, removing said jigplates, expanding said mandrels to compress and smooth the bearin facesof said linings and accurately size tie rectangular sectioned bearingholes thus formed in said coupling members for cooperation withresilient laminated spring coupling pins.

3. The process of making flexible coupling members or the like whichcomprises casting blanks for said coupling members with enlarged roughcored recesses, shaping said blanks, assembling the shaped blanks together with casting jigs fitting their peripheral edges and withrectangular sectioned expanding mandrels located in connection with saidcasting jigs and corresponding to the bearing holes to be formed in thecoupling members, casting in bearing metal linings into said rough coredrecesses and around said mandrels to accurately aline and locate saidlinings, the rectangular sectioned bearing holes thus formed in saidcoupling members being adapted for cooperation with resilient laminatedspring coupling pins.

4. The process of making flexible coupling members or the like whichcomprises forming blanks for said coupling members with enlarged roughrecesses, shaping said blanks to substantially uniform outside edgediameter, assembling the shaped blanks together with casting fittingtheir peripheral edges and with rectangular sectioned expanding mandrelslocated in said casting jigs and corresponding to the bearing holes tobe formed in the coupling members, casting in bearing metal. liningsinto said rough recesses and around said mandrelsto accurately aline andlocate said linings, expanding said mandrels to compress and smooth thebearing faces of said linings and accurately form the rectangularsectioned bearing holes in said coupling members to adapt them forcooperation with resilient laminated spring coupling pins or the like.

5. The process of making flexible coupling members or the like whichcomprises i'or1ning blanks for said coupling members with enlarged roughrecesses, shaping said blanks,

assembling the shaped blanks together with casting jigs fitting theirperipheral edges and with rectangular sectioned expanding mandrelslocated in said casting jigs and corresponding to the bearing holes tobe formed in the coupling members, casting in bearing metal linings intosaid rough recesses and around said mandrels to accurately aline andlocate saidlinings and form the rectangular sectioned bearing holes insaid coupling members to adapt them for cooperation with resilientlaminated spring coupling pins or the like.

6. The process of making flexible coupling members or the like whichcomprises forming blanks for said coupling members with enlargedrecesses, assembling the blanks together with casting jigs and withrectangular sectioned expanding mandrels located in said casting jigsand corresponding to the bearing holes to be formed in the couplingmembers, casting in bearing metal linings into said recesses and aroundsaid mandrels to accurately aline and locate said linings and form therectangular sectioned bearing holes in said coupling members to adaptthem for cooperation with resilient laminated spring coupling pins orthe like.

7. The process of making flexible coupling members or the like whichcomprises casting blanks for said coupling members with enlarged roughcored recesses, shaping said blanks to substantially uniform outsideedge diameter, assembling the shaped blanks together with casting jigsand with expanding mandrels located in connection with said casting jigsand corresponding to the bearing holes to be formed inthe couplingmembers, casting in Babbitt metal linings into said rough cored recessesand around said mandrels to accurately aline and locate said linings andsize the bearing holes in said coupling members to adapt them forcooperation with resilient laminated. spring coupling pins.

8. The process of making flexible coupling members or the like whichcomprises forming blanks for said coupling members with enlargedrecesses, assembling the shaped blanks together with casting jigs andwith mandrels located in connection with said casting jigs andcorresponding to the hearing holes to be formed in the coupling members,casting in metal. linings into said recesses and around said mandrels toaccurately aline and locate said linings and size the bearing holes insaid coupling members to adapt them for cooperation with resilientlaminated spring coupling pins.

ROBERT A. SMITH.

